He used to come to visit the Prophet ﷺ. He said, "Whenever I found him praying, he would say tasbih to indicate his state, and I would enter. If he was not praying, he would give me permission to enter."
حدثنا علي بن إسحاق أنبأنا عبد الله أنبأنا يحيى بن أيوب عن عبيد الله بن زحر عن علي بن يزيد عن القاسم عن أبي أمامة أن
أنه كان يأتي النبي ﷺ قال فكنت إذا وجدته يصلي سبح فدخلت وإذا لم يكن يصلي أذن
No references are available.
Its isnad is daif, and it is a repeat of 809. The discussion of it was given in detail previously at 598. See also 647.